Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of kinds and concentrations of osmoticum on somatic embryo induction and germination from suspended embryogenic cell in Larix kaempferi

낙엽송(Larix kaempferi) 현탁배양된 배발생세포로부터 체세포배 유도 및 발아를 위한 삼투압제 종류 및 농도 효과

  • Kim, Yong-Wook (Div. of Forest Biotechnology, Korea Forest Research Institute)
  • 김용욱 (국립산림과학원 산림생물공학과)
  • Received : 2013.06.29
  • Accepted : 2013.09.09
  • Published : 2013.09.30
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Abstract

This study was conducted to examine suspended embryogenic cells growth with days of culture, effects of various kinds/concentrations of osmoticum for induction of somatic embryos (SEs), following somatic embryos germination or plantlet regeneration. The proliferation pattern of embryogenic cells in suspension culture is characterized by settled cells volume (SCV) increased with the duration of culture with marked the maxium of SCV (10.1 ml) in 18 days of culture, however the SCV of cells gradually decreased after that. In comparison of kinds/concentrations of osmoticum on somatic embryo induction, the highest induction number (352.3/g FW) of the SE was showed in 0.2 M sucrose, in addition, we also observed some effects with treatments of 0.2 M maltose (203.7) and 0.3 M maltose (193.7), respectively. However, no somatic embryos produced in treatments of 7.5% PEG plus 0.15 M sucrose or maltose. In comparison of germination efficiency of SEs which occurred from the treatments of various kinds/ concentrations of osmoticum, the highest induction frequency of cotyledon (25.2%) was obtained from SEs that produced 0.3 M maltose, however, the best occurrence rates of hypocotyl (39%), radicle (30.3%) and plantlet regeneration (3.5%) were observed from the 0.2 M sucrose treatment, respectively.

본 연구는 낙엽송 배발생세포의 배양기간에 따른 현탁세포의 생장, 체세포배 유도 및 발아를 위한 다양한 삼투압제 종류 및 농도 효과를 조사하기 위해 수행되었다. 배발생 현탁세포의 생장은 배양일수가 증가함에 따라 settled cells volume (SCV)가 지속적으로 증가하는 경향을 보여 배양 18일 경에는 최대 10.1 ml의 SCV를 보였고, 그 이후로는 세포생장이 감소하였다. 현탁세포로부터 체세포배 발생을 위한 삼투압제 종류 및 농도에 따른 효과 비교에서 최대의 체세포배 유도 수는 0.2 M sucrose 처리구에서 352.3개(/g FW)로 나타났으며, 0.2 M maltose (203.7) 및 0.3 M maltose (193.7) 처리구에서 또한 효과가 있었다. 그러나 7.5% polyethylene glycol (PEG)이 첨가된 0.15 M sucrose 혹은 maltose 각각의 처리구에서는 체세포배 발생이 전혀 이루어지지 않았다. 다양한 삼투압제 종류 및 농도에서 발생된 체세포배의 발아율 비교에서는 최대 자엽 형성율(25.2%) 0.3 M maltose, 하배축 형성률(39%), 뿌리 발생율(30.3%) 및 식물체 재분화율(3.5%)은 0.2 M sucrose 처리구에서 각각 나타났다.

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References

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